Katy Perry has been accused of sexual assault, reports Variety. The allegation, which was first documented on Instagram, comes from male model Josh Kloss. He describes an alleged incident of forced genital exposure and general workplace discomfort. The allegations date back to 2010, when Kloss performed the role of Perry's love interest in the "Teenage Dream" music video.

Kloss wrote a lengthy story on Instagram.

Kloss posted his initial allegations on Instagram. He included a screenshot of the music video alongside a lengthy caption, calling the "Teenage Dream" video shoot one of the most "confusing, assaulting, and belittling jobs I’ve ever done."

Kloss describes Perry making him uncomfortable on the set.

Kloss begins his statement by describing Perry's workplace treatment. He says that Perry's overall demeanor was "cool and kind," but changed during filming. "When other people were around she was cold as ice even called the act of kissing me 'gross' to the entire set while filming," wrote Kloss, adding that it made him feel embarrassed.

He alleges an incident of sexual assault.

Kloss goes on to allege that Perry forcibly exposed him at Moonlight Rollerway skating rink in Glendale, California. Kloss arrived at the rink with a friend. "...As I turned to introduce my friend, she pulled my Adidas sweats and underwear out as far as she could to show a couple of her guy friends and the crowd around us, my penis," wrote Kloss.

Kloss writes about feeling "shocked."

In the post, Kloss writes about his emotional reaction to the alleged assault. He said he felt "pathetic and embarrassed," and in a follow-up post, he says that he was "shocked" and that the "fear sticks with you."

He says he felt obligated to protect Perry's image.

After the alleged assault, Kloss explains that he was forced to reconcile his experience with the perception of her music as "great empowering anthems," acknowledging in a separate post that "children [are] uplifted by positive music she sang."

Kloss decided to come forward because he believes that misuse of power has no gender.

"POWER empowers what is corrupt in people, regardless of their gender," wrote Kloss, correctly pointing out that sexual misconduct is rooted in power imbalance. "Our culture is set on proving men of power are perverse. But females with power are just as disgusting."

Perry has not commented on the allegations.

Variety was not able to reach Perry for comment. Revelist has also reached out to Perry for comment, and will update this story if we receive a response.